Driving mechanism for screw drivers and drills



Oct- 29, 1940- T. s. BARBEAU 2,219,509

DRIVING MECHANISM FOR SCREW DRIVERS AND DRILLS Filed Hay 15, 1940 d F: E. j Y l Inventur' 5 T. 5. BELRBEHU B qgmmm-@L Patented Oct. 2 9, 1940 UNITED STATES PATENT `GFFICE DRILLS Thomas Samuel Barbeau, Ancaster, Ontario, Canada Application May 15, 1940, Serial No. 335,350

8 Claims.

My invention relates to driving mechanism for screw drivers and drills and an object of my `invention is to devise an improved means for actuating the screw driver or drill.

5 A further object is to construct a driving mechanism which can be operated by both hands.k

A still further object is to originate a construction which will be simple and effective and which can be manufactured in quantities at a reasonable cost.

With the above and other objects in View which will hereinafter appear as the specification proceeds, my invention, in itspreferred embodiment, consists of the construction and arrangement all 15 as hereinafter more particularly described and illustrated in theV accompanying drawing in which:

Fig. 1 represents a front elevation of a screw driver constructed according to my invention.

' Fig. 2 is a side elevation thereof, and

Fig. 3 is an enlarged section taken through the line 3-3 (Fig. 1).

Like characters of reference indicate corresponding parts in the different views of the drawing.

In the device as illustrated which shows my driving mechanism applied to a screw driver, I represen-ts a rectangular frame with one end 2 detachable. Said frame is provided at its ends with bearings 3 and e which receive the ends of a spindle 5 which carries a worm 6, the lower end of the spindle 5 protruding through the bearing 3 and being provided with'a chuck 1 adapted to receive a screw driver 8 or alternatively a bit or twist drill.

The side members of the rectangular frame I serve as guides for the slides9 extending therebetween, said slides being disposed on opposite sides of the rectangular frame I and having on the outer face of each spaced apart bearings I0 through which pivot pins II formed' on a plate I2 secured to the inner end of a handle I3 extend. Each of said handles has a shaft I4 extending freely and axially inwardly therethrough and freely through the slide being provided on its inner end with a disc I5 adaptedto engage a side surface of the flight of the worm 6.

The outer end of each shaft I4 has an enlarger ment I6 located in a bore Il in the outer end of "o each handle i3, which bore is closed by a screw plug I8 and a spring I9 is interposed between each screw plug and the enlargement I6 on the corresponding shaftv llt.

In order to hold the handles I3 in etherof two positions one bearing lil of each pair is provided with a toothed quadrant 20 with which a pawl 2I on the handle I3 is designed to engage.

So that the slides may be operated in unison some adequate means must be provided for intery connecting them. As illustrated this means may 5 comprise cables 22 and 23 attached to the opposite ends of the slides 9 and passing respectively over pulleys 24 and 25 on the top and bottom ends of the frame I.

The top end 2 of the rectangular frame I is provided with an extension 2B carrying a breast pad 21. v v

Assuming that the parts .of the mechanism are positioned as illustrated in the drawing with the axes of the shafts I4 inclined to the axis of the 15 worm 6 and the left and right hand discs I5 (Fig. 2) respectively engagingthe upper facesof the worm flights and resiliently held thereagainst bythe springs I'I urging the shafts I4 inwardly, 20 .the tool is held by the operator grasping the handles I3 with the breast pad 21 `in engagement with his breast and the chisel shaped end of the screw driver 8 inserted into the slot in the screw to be driven (not shown). By pushing down on ,25 the right hand handle its connected disc I5 is rotated and presses downr on the worm fIght turning the worm 6 in the direction of the arrow (Figs. 1 or 2) and consequently rotating the screw driver 8- so that the screw is driven in. Simul- 0 taneously by pulling up on the left hand handle I3 its connected worm owing to bearing resiliently on the worm ight is retracted and rides over the flights of the worm until the slide reaches its uppermost position on the frame whenv by pushing down on the left hand handle its connected disc I5 takes up the drive of the worm and the right hand handle is pulled up causing its connected disc to slide over the flights of the worm.

Thus by alternately pushing down and pulling up on the respective handles the wormand its attached screw driver is substantially continuously driven in the direction of the arrow.

To reverse the direction of rotation of the worm it is only necessary to swing the handles until the handles (Fig. 2) engage the lower surfaces of the Worm flights when by repeating the above reciprocal operation of the mechanism the worm and its attached screw driver are rotated in the reverse direction to that above indicated.

From the above description it will be apparent that a simple and effective means is provided for driving a screw driver, or bit or drill substituted therefor. In fact the mechanism described and illustrated may be employed for any other pur-4 pose where it is desired to translate reciprocating power into rotary motion. Furthermore instead of reciprocating the slides manually by the handles they could be reciprocated mechanically. For instance, the mechanism might be employed for driving a bicycle or tricycle or for propelling a small boat.

What I claim as my invention is:

1. Means for translating reciprocating applied power into rotary motion comprising a frame, a rotatable worm journalled longitudinally therein and including a power take off thereon, a slide longitudinally reciprocable on the frame, a shaft journalled on the slide with its axis at an angle to the axis of the worm and axially slidable, a disc on the inner end of the shaft and adapted to engage a side surface of the night of the worm, a spring urging the shaft and disc inwardly, and means for reciprocating the slide whereby the disc rotates the engaged worm during the stroke of the slide in one direction and slides over the night of the worm without rotating it during the reverse stroke of the slide.

2. The invention as claimed in claim 1 wherein means is provided on the slide for reversing the angularity of the shaft with respect to the Worm whereby the disc attached to the inner end of the shaft engages the opposite side face of the flight of the worm and rotates such worm and the attached power take on in a reverse direction upon reciprocation of such slide.

3. Means for translating reciprocating applied power into rotary motion comprising a frame, a rotatable worm journalled longitudinally therein and including a power take on thereon, a slide longitudinally reciprocable on one side of the frame, a second slide longitudinally reciprocable on the opposite side of the frame, means between the slides for interconnecting them for actuation in unison but in opposite directions, a shaft journalled on each slide with its axis at an angle to the axis of the worm and axially slidable, a disc on the inner end of each shaft and adapted to engage a corresponding side face of the night of the worm, a spring urging each shaft and disc inwardly, and means for reciprocating each slide whereby the disc on its shaft rotates the engaged worm during the stroke of such slide in one direction and slides over the night of the worm without rotating it during the reverse stroke of such slide.

4. The invention as claimed in claim 3 wherein means is provided on each slide for reversing the angularity of its shaft with respect to the worm whereby the disc attached to the inner end thereof engages the opposite side of the night of the worm and rotates such worm and the attached power take off in a reverse sense upon reciprocation of such slide.

5. A device comprising a longitudinal frame, a rotatable worm longitudinally journalled therein and including a tool gripping chuck, a

slide longitudinally reciprocable on the frame, a handle including a rotatable shaft longitudinally slidable therein, means for attaching the handle to the slide so that the axis of the shaft is disposed at an angle to the axis of the worm, a disc on the inner end of the shaft adapted to engage a side face of the night of the worm, and a spring in the handle adapted to urge the shaft and disc inwardly, said handle being adapted to be manually reciprocated whereby the disc rotates the engaged worm during the stroke of the attached slide in one direction and slides over the night of the worm Without rotating it during the reverse stroke of the slide.

6. A device comprising a longitudinal frame, a rotatable worm longitudinally journalled therein and including a tool gripping chuck, a slide longitudinally reciprocable on the frame, a handle including a rotatable shaft longitudinally slidable therein, means for attaching the handle to the slide so that the axis of the shaft is disposed at an angle to the axis of the worm, a disc on the inner end of the shaft adapted to engage a side face of the flight of the worm, a spring in the handle adapted to urge the shaft and disc inwardly, said handle being adapted to be manually reciprocated whereby the disc rotates the engaged worm during the stroke of the attached slide in one direction and slides over the night of the worm without rotating it during the reverse stroke of the slide, and means incorporated in the means for attaching the handle to the slide for swinging and locking the handle in a position whereby its shaft is disposed in reverse angularity to the worm so that the disc on the inner end of the shaft engages the opposite side face of the night of the worm.

7. A device comprising a longitudinal frame, a rotatable worm longitudinally journalled therein and including a tool gripping chuck, a slide longitudinally reciprocable on one side of the frame, a second slide longitudinally reciprocable on the opposite side of the frame, a handle for each slide including a rotatable shaft longitudinally slidable therein, means for at- A taehing each handle to its slide so that the axis of its shaft is disposed at an angle to the axis of the worm, a disc on the inner end of each shaft engageable with the corresponding side face of the night of the worm, a spring in each handle adapted to urge its shaft and disc inwardly, and means for connecting the slides so that they slide in unison but in opposite di rections, said handles being adapted to be manually reciprocated whereby each disc rotates the engaged worm during the stroke of the attached slide in one direction and slides over the night of the worm without rotating it during the reverse stroke of the slide.

8. The invention as claimed in claim 7 where- THOMAS SAMUEL BARBEAU. 

